Device for the interruption of the



y 1938. A. M 1. HOOGENDAM 2,118,349

' DEVICE FOR THE INTERRUPTION OF THE FUEL SUPPLY TO A BURNER FOR LIQUIDFUEL Filed Jan. 11, 1937 Patented May 24, 1938 UNITED STATES PATENTorries DEVICE FOR THE INTERRUPTION OF THE FUEL SUPPLY TO A BURNER FORLIQUID FUELY Adriaan Marius Isaac Hoogendam, Delft, Netherlands,assignor to Shell Development Company, San Francisco, Calif., acorporation of Belaware Application January 11, 1931, Serial No. 119,981In the Netherlands January 18, 1936 2 illairns.

The invention has for its object. a device requiring but a very smallregulating power for shutting-oil and opening again the fuel supply andnevertheless ensuring an absolutely reliable shut-off.

Where the magnitude of the regulating power required does not play apart, as with hand-operated devices, a cock'or needle valve may beapplied as a shutting-off member, but in those cases where the operationis automatic, the direct regulating power availableisusuallyinsufficient to' obtain an eflicient shut-oil with such valve members.This problem presents itself, for instance, in cases where the burner isused ior.heating a hot water reservoir, and has to be extinguishedautomatically as soon as the water has reached a certain temperature.The suflicientlysensitive thermostats usually applied for this purposedevelop but a small direct regulating power.

According to the invention, aweir is fitted in the line between the feedreservoir and the burner, which, with a view to interrupting the supply,can be raised above the liquid level. No

difliculties are encountered in constructing the weir in such a mannerthat only little power is required for raising it, which power canreadily be supplied by a thermostat. Once the weir has been raised toabove the constant liquid level, it is absolutely impossible for anyfurther liquid to reach the burner over the weir.

Various embodiments of the device according to the invention arepossible. For instance, the w'eir may be connected rigidly to the lineand the latter made vertically movable at the place of the weir, orthe'weir may form a vertically mov- I able cup fitted in an openreservoir forming part of the feed line.

The drawing shows an example of each of these two embodiments. Fig. I isa plan view showing 9.

- preierredform of shut-oil mechanism. Fig. 11

is an elevation partly in section of the mattershown in Fig. I. Fig.IIIis an enlarged side .elevation of the weir of Fig. I and Fig. II.Fig. IV

is an elevation of an oil feed tank showing an-' other form of weir.

Referring to Figures I and H, i is afuel tank in the form of a Mariottebottle from which through an opening at the bottom thereof the feedreservoir -2 is always kept filled with fuel to a constant level.

Through the piping system, 3, 4i, 5, 6, 1, and 8, this fuel is fed tothe burner 9. y

Within this system, the section 5, 6 and I can turn about a horizontalaxis. For this purpose, the piping parts 4 and 8 are of flexibleconstruction, The parts 5 and I unite at 6, where the line has anopening at the top and forms at the bottom an edge or weir ill (see Fig.III) which is preferably as sharp as possible. While the burner isoperating, this weir It lies below the in Fig. III iiowsover it. Fordiscontinuing the supply of fuel to the burner, it is only necessary toturn the section 5, 6, 1 about the axis untiltheweir is raised above theconstant liquid level. Since this requires but little power, it canreadily be effected by means of a thermostat i I attached to the parts 5and 1. The heat sensitive bulb I2 of the thermostat may; for instance,be fitted in the water space of a hot water geyser heated by theburner9. The opening at 6 is necessary in order to avoid siphoning of fuelover the weir l0 after this has been raised to above the constant level.

A branch l3 of the line 3 leads to a continuously burning pilot H whichserves to reignite the extinguished burner- 5 as soon as the fuel supplyis reopened.

With the embodiment illustrated in Fig. IV, the fuel piping itself isimmovable, but a vertically movable cup with weir is provided in areservoir fitted in the line. In Fig. IV, i is also the Mariotte bottlepositioned over a fuel feed reservoir i5 filled from it. This feedreservoir I6 is surrounded by a second reservoir it connected to theburner by means of the line 3. Between the walls of the two reservoirs acup H is provided which can turn about a horizontal axis at l8 and intowhich the fuel from reservoir l5 can pass through opening i 9. At theside opposite the axis It, the cup has an opening an about atthe heightof the liquid level, the lower edge of which servesas a weir for thefuel.

In the position shown in the drawing, this opening 2!! lies below theliquid'level; however, when the cup is raised by means of the extension2i, the opening may come to lie above this level, so that the supply oifuel to the burner through the line'3 is interrupted. The movement oithecup may also in this case be derived from a thermostat H.

The fuel supply interrupting device, according to the invention, mayalso quite suitably be operated electrically, e. g., by means ofanelectrovoir, said cup having an opening in its vertical wall, a hingeconnecting one side of said cup to .the reservoir, an elongated handleattached to the opposite side of said cup, a thermostat connected tosaid handle whereby said cup may be raised 7 above the liquid level insaid reservoir.

2. A device for the interruption of a fuel supply to a burner for liquidfuel fed from a reservoir in which a constant liquid level ismaintainedcomprising: a reservoir, a cup in said reservoir, said cuphaving an opening in its vertical wall, a hinge connecting one side ofsaid cup to the reservoir, and an elongated handle attached to theopposite side of said cup whereby said cup may be raised above theliquid level in said reservoir.

ADBIAAN MARIUS ISAAC HOQGENDAM.

